Piston for internal-combustion engines.



0. E. JORGENSEN.- PISTON FOR INTERNAL COMBUSTION ENGINES.

APPLICATION min AUG-l3. 1914.

1 155,244. Patented Sept. 28, 1915 STATES rarnn r curren OLAV ESKIL JORGEN'SEN, 0F GLASGOW, SCOTLAND, ASSIGNOR TO THE ATLAS MERCANTILE COMPANY, LIMITED, OF LONDON, ENGLAND.

PISTON FOB INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent. Patented Sept. 28, 1915.

Application filed August 13, 1914. Serial No. 856,611.

To all whom it may concern:

Be it known that I, OLAV ESKIL JoRGnN- SEN, a subject of the King of Denmark, and resident of 172 Lancefield street, Glasgow, Scotland, engineer, have invented certain new and useful Improvements in an Improved Piston for lnternal-Combustlon Engines, of which the following is a specification.

This invention relates to the pistons, of Diesel and other internal combustionengines, of the type in which the body or cylindrical portion of the piston is provided, between the working face of the piston and the second face or back part, with a space through which cooling liquid is circulated for cooling the working face and body portion of the piston, while the piston rod supports the working face through internal means such as ribs, webs or other means extending from the center'of the piston to the cylindrical body portion thereofL- In such pistons as heretofore proposed the working facewas very liable to fracture due to the unequal expansion of the cylindrical body portion on the one hand and the internal supporting ineans for the working face on the other hand, the former being only cooled,internally while the latter was completelysurrounded by the cooling medium. I am aware-however that it has been heretofore proposed to provide a piston in whichthe working face is supported directly from the piston rod while the cylindrical body portion is supported onlyfr'om the working face, and. is free to expand independently of the internal parts of the piston. Under the present invention I improve the construction of such pistons by provid ing means whereby the working face (which preferably takes the form of a comparatively thin fire resisting member) is supported only internally from the. piston rod by means of ribs, webs or other means located between the center of the piston'and the outer edge of the working face while the cylindrical body portion of the iston issupported only from the working Face.

Inorder that the invention may be clearly understood I have hereuntoappended ex planatory drawings which show by way of illustration or example one mode of constructing the piston.

On the drawing the piston is shown in section.

The Working face a and the cylindrical body part b of the piston are formed in one piece and provided on the inner side of the working face a are three concentric supporting'rings or ridges c which all engage a flange d on the end of the piston rod e, and the piston is connected with the piston rod by means of screws f passed through the flange d and into holes provided for their reception in the intermediate ring or ridge 0. The second face or backwpart of the piston consists of a ring part or plate 9' rigidlysecured by means of screws k to a ridge or internal collar l in the cylindrical body part b, and having a collar on provided with a packing ring n for engagement with the piston rod e.

The cooling water (or oil) is supplied by means of the central pipe 6 to the center of the working face a and passes outward bustion engines, having a working face, 5

means located between the center of the piston and the outer edge of the same for rigidly supporting the working face in axial Y direction from the front face of the piston. rod, a cylindrical body portion supported only from the working face, and a back part movably fitted between the said body portion andthe piston rod at a distance from its front face, and means for conducting cooling liquid centrally against the back portion of the working face.

2. A liquid cooled piston for internal combustion engines, having a working face, sup porting. ribs located between the center of the piston and the outer edge of the same for rigidly supporting the working face in axial direction from the front face of the piston rod, and a cylindrical body portion supported only from the working face and means for conducting cooling liquid centrally against the backportion of the workmg face.

3. A liquid cooled piston for internal comconducting cooling liquid centrally against a piston rod with a flange on the end of the bustion engines, having a working face, a series of IlbS on the back ofthe working face, and located between the center of the piston and the outer edge thereof, a flange on the end of. the piston rod for rigidly supporting the'working iacethrough such ribs,

and a cylindrical body portion supported only from the working face and means for piston rod for engaging the said ribs'in such manner that the working face is supported from the piston rod, a detachable disk extending between the rear end of the body portion;;of the piston and the piston rod in such inanneras to permit of relative movementdue to inequalities of expansion in the diflerent parts, and a central pipe through "the piston rod for directing cooling liquid against the back of said working face, said I I piston rod, and flange being provided with passages for conducting cooling liquid from the space between the working face and the 5. A liquid cooled piston for internal combustion engines having a cylindrical body portion, a working face from which the body portion is supported, a series of annular supporting ribs on the back of the working face and located between the center of the piston and the outer edge thereof, a flange on the end of thepiston rod for engaging the said ribs in such manner that the working face is supported from the piston rod, a rear portion extending between the'body portion of the piston andthe piston rod in such manner as to permit of relativemovement due to inequalities of expansion in the difl'erent parts, means for supplying cooling liquid through the piston rod to the interior of the piston, perforations in the said supporting ribs to permit of the free circulation of cooling liquid against the back of the working face, and

means for conveying the liquid through the piston rod from the cooling space.

V OLAV ESKIL J ORGENSEN.

Witnesses:

Jums AIKEN, MA'PI'HEW SHEARER. 

